You need to either get into trucking or forget it. I suspect you have a case of white line fever, so just do it why don't you? Yeah those are both nice trucks but the Vovlo probably gets better MPG.
Whats wrong with a mid roof Soonk you can still stand up in it, don't need a drop down bunk if its just you, I drove a freightliner with a 70" condo and I couldn't even jump and reach the top, semed a waste..JMO.